The doubter need look no farther than the backstory to the near-epic rise and fall of Andrew Mason and his Mephistopheles, Eric Lefkofsky.

FORBES: Success Without Social Value: What Happened with Groupon?

Groupon's executive chairman Eric Lefkofsky and vice chairman Ted Leonsis are stepping in as temporary joint chief executives until a replacement for Mr Mason can be found.

BBC: Groupon shares rebound after founder is sacked

The daily deals company said Executive Chairman Eric Lefkofsky and Chairman Ted Leonsis have been named to the newly created office of the Chief Executive, replacing Mason, effective immediately.

FORBES: Groupon Ousts Andrew Mason